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Gemini 3.5 Flash Lite

googlegoogle/gemini-3.5-flash-lite

API guide

Chat completion

Standard OpenAI-compatible chat completion. Thinking is supported with flexible levels; thinking tokens are billed as output.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/gemini-3.5-flash-lite","messages":[{"role":"user","content":"Classify this ticket: billing or technical?"}]}'

Structured output

Structured outputs are supported upstream, which is the main reason to reach for this tier in extraction pipelines.

cURL
curl https://api.therouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $THEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.5-flash-lite",
    "messages": [{"role":"user","content":"Extract the invoice total and currency."}],
    "response_format": {"type":"json_object"}
  }'
Fact ledger β€” every claim on this page traces here
sourceURLretrieved
Release datedeepmind.google β†—2026-07-28verified
Knowledge cutoffdeepmind.google β†—2026-07-28verified
Input token limitai.google.dev β†—2026-07-28verified
Output token limitai.google.dev β†—2026-07-28verified
Native modalities (upstream)ai.google.dev β†—2026-07-28verified
Supported capabilitiesai.google.dev β†—2026-07-28verified
Not supported upstreamai.google.dev β†—2026-07-28verified
Vendor list price (Standard tier)ai.google.dev β†—2026-07-28verified
Output throughputblog.google β†—2026-07-28to verify
SWE-Bench Prodeepmind.google β†—2026-07-28verified
Terminal-Bench 2.1deepmind.google β†—2026-07-28verified
MLE-Benchdeepmind.google β†—2026-07-28verified
OSWorld-Verifieddeepmind.google β†—2026-07-28verified
CharXiv (no tools)deepmind.google β†—2026-07-28verified
GDM-MRCR v2 (128k)deepmind.google β†—2026-07-28verified
GDM-MRCR v2 (1M pointwise)deepmind.google β†—2026-07-28verified
GDPval-AA v2deepmind.google β†—2026-07-28verified
Gemini 3.5 Flash-Lite lands as the new budget tierblog.google β†—2026-07-28verified
When should I use Flash-Lite instead of Gemini 3.6 Flash?deepmind.google β†—2026-07-28to verify
Does it really have the full 1M-token context window?deepmind.google β†—2026-07-28to verify
Is audio input charged at a premium?ai.google.dev β†—2026-07-28to verify
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